Mutual Screw & Supply

5/16-18 X 3" Socket Cap Screws | Hex Socket Drive | Partially Threaded | 316 Stainless Steel (50 / Pkg.)

5/16-18 X 3" Socket Cap Screws | Hex Socket Drive | Partially Threaded | 316 - Main image
$29.29 $48.82 In stock

These 5/16-18 x 3" socket cap screws are manufactured from 316 Stainless Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 316 Stainless Steel
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 5/16-18
  • Length: 3"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Grade: 316
  • Drive type: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 5/16-18
  • Length: 3"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 50 per package
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Henry S. ★★★★★

Had to swap out some old bolts on a saltwater dock fitting, and these 316 stainless cap screws fit perfectly with no corrosion worries. The hex socket drive made installation a breeze with my T-handle wrench.

Lily ★★★★★

The partially threaded design made installation in tight spots much easier than I expected. These 316 stainless screws fit perfectly into my tooling jig, and the hex drive gripped securely without stripping. Solid quality for precision assemblies.

Lily ★★★★★

Used these for a custom jig I’ve been building, and the partially threaded design gave me just the right grip without bottoming out. They’re solid 316 stainless, so no rust worries even in my damp garage. Took a bit of torque without stripping, which is all I ask for.